Whoever, in middle age, attempts to realize the wishes and hopes of his early youth, invariably deceives himself. Each ten years of a man's life has its own fortunes, its own hopes, its own desires.

Oblivion is full of people who allow the opinions of others to overrule their belief in themselves.

Each one of us must carry within the proof of immortality, it cannot be given from outside of us. To be sure, everything in natureis change but behind the change there is something eternal.

One that does not think to highly of himself is more than he thinks.

I have come to the frightening conclusion that I am the decisive element. It is my personal approach that creates the climate.

I do not know myself, and God forbid that I should.

Mathematics can remove no prejudices and soften no obduracy. It has no influence in sweetening the bitter strife of parties, and in the moral world generally its action is perfectly null.